An Error Tracking Dead-beat Model Predictive Torque Control for Open-Winding Permanent Magnet Synchronous Motor with Common DC Bus

Abstract

This paper proposes an error tracking dead-beat model predictive torque control (ETDB-MPTC) strategy for a dual-inverter fed open-winding permanent magnet synchronous motor with common dc bus. Due to the one-step delay, one-step compensation is introduced into the system discrete model setup. Besides, in order to suppress zero sequence current (ZSC), a ZSC component is introduced in the cost function of the MPTC. Dead-beat (DB) method, which derives the reference voltage vector (VV) according to the reference torque and stator flux, is employed to avoid tedious tuning work of weighting factors. Furthermore, 3-dimensional space coordinate system is established and the positions of all voltage vectors produced by dual-inverter are analyzed. For better tracking of the reference VV, three VVs produced by dual-inverter are selected in 3-dimensional space. Simulation and experimental results verify the effectiveness of the proposed strategy.